Study of radioactive status in the Zhujiang Estuary and adjacent sea area in South China Sea (SCS)

Through the investigation on radioactive activities of water, sediment and some marine organismsin the Zhujiang Estuary, adjacent sea area and the distributary mouths of the Zhujiang River, activities of total α. radioactivity, total β radioactivity, artificial radioactive 90Srand 157Cs, and factors inflencing the distribution and the content of U in seawater are studied.The mainly radioactive pollution substances and their sources in the sea area are studied by γ spectra obtained from sediment in the sea area. The results show that the main radioactivity substances are natural radioactivity U,Th series and 40K. which were produced by the modern industry and transported into the sea through the main current of the Zhujiang River.

Study on Iron Nutritional Status in Adolescence

A study on iron-deficiency anemia (IDA) in adolescence was conducted among 478 teen-age students in Shanghai. The study indicated that the intake of nutrients among the students was generally insufficient. The lack of protein, calcium, Vitamin A, Vitamin B_1, and Vitamin B_2 was more serious. The morbidities of IDA among male and female students were 15.8 and 32.6%, respectively, higher in the female group (P<0.01). The iron-deficiency sufferers among male and female students were 46.8 and 61.8%, respectively, also higher in the female group (P<0.01). The causes of IDA were analyzed by the method of stepwise regression. In a study of the effect of IDA on intelligence and physical development in adolescents, we found that there was no significant effect of IDA on intelligence quotient (IQ) and school performance. However, the speed and endurance capabilities of students of both sexes were correlated directly with hemoglobin level. In female students, the speed capability was correlated directly with the serum ferritin content. On the basis of these findings, a special 3-month school lunch program was initiated. The results indicate that a comprehensive, rational, and balanced diet is beneficial to hemoglobin, free erythrocyte porphyrin, and serum ferritin contents and improves adolescent development. 1990 Academic Press. Inc.

Ching-Yu Cheng:current status quo of population-based study on glaucoma

Introduction Dr.Ching-Yu Cheng(Figure 1)is currently an Associate Professor of the Academic Medicine Research Institute and the Academic Clinical Program for Ophthalmology and Visual Sciences(Eye ACP)at Duke-NUS Graduate School of Medicine;and Department of Ophthalmology,Yong Loo Lin School of Medicine,National University of Singapore.

The study of college secondary department student status management and countermeasures——as KunmingUniversity of engineering secondary departments for case analysis

The management of College Students’ status is a professional policy work. The point of regulating college students’learningbehavior is registration management. According to the analysis on the issue of popular education stage of college registration management,it’s important to reinforce the registration management of affi liated college and put forward work ideas, formulate detailed measures. Thatcan regulate and optimize students’ learning behavior and promote school spirit, teaching style, study style, improve the effectiveness of theeducation of students.

Present status of studies on diffuse axonal injury

OBJECTIVE: To explain the present status of study on diffuse axonal injury, investigate its pathogenesis and pathophysiological changes, and suggest principles for the diagnosis and treatment. DATA SOURCES: Articles about diffuse axonal injury published in English from January 1994 to October 2006 were searched in Pubmed database using the of 'diffuse axonal injury, pathogenesis, therapy'. STUDY SELECTION: The collected articles were primarily screened to select those associated with diffuse axonal injury, the obviously irrelated articles were excluded, and the rest ones were retrieved manually, and the full-texts were searched. DATA EXTRACTION: Totally 98 articles were collected, 41 of them were involved, and the other 57 were excluded. DATA SYNTHESIS: Diffuse axonal injury is mainly caused by acceleratory or deceleratory injury, and its pathophysiological change is a progressive duration, local axonal injury finally develops to axonal breakage, mainly includes inactivation of natrium channel, intracellular Ca2+ overloading, activation of calcium protease, caspase, etc., and mitochondrial injury. At present, there is still lack of effective therapeutic methods for diffuse axonal injury, so we should actively explore more effective methods to relieve the pain of patients and improve their prognosis. CONCLUSION: At present, diffuse axonal injury has not attracted enough attentions in China, the mechanisms for its diagnosis and attack are still unclear, and the treatments are mainly aiming at the symptoms.

Current Status and Progress of Study on Perioperative Period

The practice of evidence-based medicine （EBM） in recent years has spurred the increased study of the peri-operative period （POP） and has won acclaim. At present, surgeons fully recognize the importance of the POP and are enthusiastically immersing themselves actively into itsresearch.